更新时间:2023-02-18 16:19:36
在Java对象中,使用 new
关键字
In java objects are created using new
keyword
创建新的大小为
10
的Integer
数组,该数组由方括号[]
creating new
Integer
array with size10
, array consists of square brackets[]
Integer[] array = new Integer[10];
System.out.println(Arrays.toString(array)); // print array values `[..]`
创建值为10的
Integer
对象
Integer object = new Integer(10);
System.out.println(object); // print object value 10
创建仅包含
Integer
值
List<Integer> list = new ArrayList<>();
list.add(object);
System.out.println(object); // prints list with values [10]
尖括号
<>
是泛型,用于定义同类对象(例如,仅整数列表)
Angular brackets
<>
are Generics, that are used to define homogeneous type of objects (for example list of Integers only)